No matter how superior the GPU, the latency from streaming will never be able to compete if you're outside of a major hub.
I couldn't imagine playing a game by streaming inputs to a server 30ms away, which then streams those inputs another 30ms to the game server, and then having that round trip.
60ms screen delay and 120ms total delay.
Fair. There's a free 1080p Nvidia Geforce NOW tier anyone can try to see if latency is an issue for them and the games they play.
One more data point - you're getting 1080p medium settings (for latest games) with a Steam Machine at ~1000$ upfront vs 4k max settings but 20-50ms added latency (for most people) for ~20$/mo without any longterm commitment.
That's where we're at. I'm in the 2000$ upfront to get max settings, minimal latency camp myself but I consider that to be a niche, luxury purchase category.